1
Được phát hành: 1948
Superior document: Circular / California Agricultural Extension Service 142
2
Được phát hành: 1958
Superior document: Circular / California Agricultural Experiment Station ; California Agricultural Extension Service / University of California, Division of Agricultural Sciences 434
3
Được phát hành: 1947
Superior document: Circular / California Agricultural Extension Service 138
4
Được phát hành: 1953
Superior document: Circular / California Agricultural Experiment Station ; California Agricultural Extension Service / University of California, Division of Agricultural Sciences 434
5
6
Được phát hành: 1965
Superior document: Circular / California Agricultural Experiment Station ; California Agricultural Extension Service / University of California, Division of Agricultural Sciences 535